I just got a negative blood test after a 3 day embryo transfer, I have had multiple negatives. I do however have a 6 year old son that was BFP after FET. I really thought this time had worked, my gut feeling.This is what got me thinking. My sister in law had a pregnancy seen via ultrasound after 6 days of having a negative pregnancy test. If it was seen 6 days after, then her HCG should have been positive, but no, she took many including blood and urine. She did not take the meds that would have made her have her period because she had this feeling. And well now the baby is 10 months old. Has anyone had this happening?My question is could this happen to me? Can you share your stories? Should I keep my meds one more week and do an US to be sure?I want to know your thoughts. Thanks!!